APA (7th ed.) Citation

Helmholtz, H. v., & Atkinson, E. (1881). Popular lectures on scientific subjects. D. Appleton and Company.

Chicago Style (17th ed.) Citation

Helmholtz, Hermann von, and E. Atkinson. Popular Lectures on Scientific Subjects. New York: D. Appleton and Company, 1881.

MLA (9th ed.) Citation

Helmholtz, Hermann von, and E. Atkinson. Popular Lectures on Scientific Subjects. D. Appleton and Company, 1881.